CN108071595B

CN108071595B - All-medium passing type sewage pump

Info

Publication number: CN108071595B
Application number: CN201711318944.3A
Authority: CN
Inventors: 解树超
Original assignee: 解树超
Current assignee: Sichuan Shuli Pump Co.,Ltd.
Priority date: 2017-12-12
Filing date: 2017-12-12
Publication date: 2020-08-21
Anticipated expiration: 2037-12-12
Also published as: CN108071595A

Abstract

The invention relates to an all-medium-passing sewage pump which comprises a motor main body, a volute and an impeller arranged in the volute, wherein the motor main body is connected with the impeller arranged in the volute through a motor shaft; the head ends of the blades are gradually coiled at the edge position of the rear wall of the impeller and extend towards the main water inlet, and the tail ends of the blades are integrated with the main water inlet; as the blades approach the main water inlet, the impeller back wall rises to approach the main water inlet. The invention is used for solving the problem that the passing rate and the cutting effect of the silt, the small stone and the sand mud can not be improved simultaneously under different conditions.

Description

All-medium passing type sewage pump

Technical Field

The invention relates to the technical field of sewage pumps, in particular to an all-medium passing type sewage pump.

Background

The sewage pump is mainly used for conveying domestic sewage with waste shopping bags, sanitary towels and broken socks and rotten threads; ② the breeding excrement with various hairs, residual grass and bamboo sticks; thirdly, the fishpond sludge with shells and small stones; fourthly, the urban sewage with the thin iron wires, the foam blocks and the branches and leaves is discharged. The conveyed medium contains fiber matter which is easy to wind or bunch, so the flow passage of the pump is easy to block, once the pump is blocked, the pump can not work normally, even the motor is burnt, thereby causing unsmooth sewage discharge and bringing serious influence to urban life and environmental protection. Therefore, the anti-clogging property and the reliability are important factors for the quality of the sewage pump. A tearing mechanism is generally arranged on a sewage pump, so that fibrous substances can be torn and cut off and then smoothly discharged without adding a filter screen on the pump.

The existing sewage pump realizes sewage conveying through a cutting medium, can solve the problem of sewage pumping and discharging, but has certain defects, such as the adjustment of the distance between a blade and the blade, the cutting of strip-shaped media and linear media can be realized, the blade can perform useless cutting on sand grains, the blade is worn to the life, the cutting effect of the blade is reduced, the invalid power is too high, the maintenance frequency is large, when the machine is stopped, sewage in a pipeline flows back, the medium can cause wheel blockage and blade blockage due to the narrow flow channel of an impeller, and the probability of secondary starting and machine halt is greatly increased.

In addition, the existing dung tanker adopts a vacuum pump, sewage is self-absorbed by vacuum, and a large amount of methane contained in the sewage or dung water can be released in a vacuum state to form foam to enter the vacuum pump, so that the vacuum pump is damaged, the maintenance cost is high, the period is long, and the dung pumping pump of the dung tanker is in a half-paralysis state.

Disclosure of Invention

The invention aims to provide an all-medium passing type sewage pump which is used for solving the problem that the passing rate and the cutting effect of silt, small stone and sand mud and various breeding excrements cannot be improved simultaneously under different conditions.

In order to achieve the above purpose, the present invention specifically provides the following technical solutions:

an all-medium-passing sewage pump comprises a motor main body, a volute and an impeller arranged in the volute, wherein the motor main body is connected with the impeller arranged in the volute through a motor shaft, the impeller comprises an impeller front wall, an impeller rear wall and blades arranged between the impeller front wall and the impeller rear wall, and a main water inlet is formed in the impeller front wall; the head ends of the blades are gradually coiled at the edge position of the rear wall of the impeller and extend towards the main water inlet, and the tail ends of the blades are integrated with the main water inlet; as the blades approach the main water inlet, the impeller back wall rises to approach the main water inlet.

Furthermore, as the blades approach the main water inlet, a circular truncated cone-shaped through hole with an inclined inner wall is formed at the main water inlet on the front wall of the impeller, so that the flow passage area of the impeller has uniform height.

Further, the blades comprise a main blade, the head end of the main blade gradually winds from the edge position of the rear wall of the impeller and extends towards the main water inlet, and the tail end of the main blade is integrated with the main water inlet; a flow passage area is formed between the impeller back wall and the impeller front wall.

Further, the blades comprise two main blades, the two main blades are uniformly distributed on the front wall of the impeller to form two flow channel areas, the head ends of the two main blades are respectively and gradually coiled from the edge position of the rear wall of the impeller to extend towards the main water inlet, and the tail ends of the two main blades are mutually coiled and are integrated with the main water inlet;

further, the blades comprise a positive blade and at least one auxiliary blade, the positive blade and the auxiliary blade are uniformly distributed on the front wall of the impeller, a flow passage area and a flow limiting area are formed between the front wall of the impeller and the rear wall of the blades, the head ends of the positive blade and the auxiliary blade are gradually coiled from the edge position of the rear wall of the impeller and extend towards the main water inlet, and the positive blade and the auxiliary blade are integrated with the main water inlet after being coiled for 180 degrees.

Furthermore, a threaded interface is formed in the rear wall of the impeller and is connected with the tail end of the motor shaft through the threaded interface.

Furthermore, a plurality of anti-jamming teeth are arranged on the front wall of the impeller and the edge of the rear wall of the impeller, which corresponds to the flow limiting area.

In the technical scheme of the invention, the corresponding effect can be achieved without arranging the auxiliary blade, only the positive blade, no auxiliary blade and no limited flow area are provided, the defects are that the flow is unstable, the low-lift overload can occur, or the condition that the high-lift flow is insufficient due to the low lift is met, the medium passing can be influenced when two positive blades are used for same coiling, and the two positive blades and the two auxiliary blades in the optimal scheme have strong medium passing capability.

Furthermore, the upper part of the volute is connected with a water outlet, the volute is also provided with an auxiliary water inlet used for injecting clean water into the volute, and the auxiliary water inlet is connected with an external water pipe through a one-way check valve.

The auxiliary water inlet can be arranged at any place of the volute, the effect of the rotation-assisted water inlet is better when the rotation-assisted water inlet is closer to the outer circle of the impeller, water is mainly fed by the operation of the impeller, and air in the volute is taken out by the auxiliary water inlet.

The auxiliary water inlet is positioned on the corresponding volute in the excircle of the impeller, when the sewage concentration is too high, clear water is injected into the volute by using a clear water source, so that water flows between the impeller and the volute, the extrusion friction force of a medium between the impeller and the volute is reduced, the operating condition of the impeller in the volute is met, the auxiliary water inlet is provided with a check valve, when air in the impeller cannot generate pressure, the auxiliary water inlet enters the volute, water flow is generated in the volute to bring out air, the water in the volute can rapidly generate pressure, and after the pressure reaches the working requirement, the check valve arranged in the auxiliary water inlet prevents sewage from entering an external water pipe. When the pressure in the volute is lower than the water pressure in the auxiliary water inlet, the water in the water pipe flows into the volute to enable the impeller to work normally, and when the pressure in the volute is higher than the water pressure in the auxiliary water inlet, the auxiliary water inlet stops water inflow under the action of the check valve.

Furthermore, a water inlet baffle is fixedly arranged at the front end of the volute corresponding to the main water inlet through a group of baffle mounting blocks, and the water inlet baffle is positioned on one diameter of the main water inlet. The sewage pump is not afraid of strip and sheet media, only afraid of overlarge and overlong wood stick media entering the impeller to form blockage, the main water inlet is provided with a baffle plate perpendicular to the main water inlet to divide the main water inlet into two parts for preventing the media from entering the main water inlet when the media is larger than a half of aperture.

Furthermore, a concave ring is arranged at the front end of the volute corresponding to the main water inlet, a filter screen is further arranged between the main water inlet and the concave ring, the filter screen is arranged at the front end of the volute, and the filter screen is intersected with the axis of the main water inlet to form a water flow curve.

A bend interception and a net interception are arranged at the main water inlet, and the interception is characterized in that the net main water inlet is large; the bend interception is that a concave ring is arranged at the bottom of a main water inlet, a main water inlet is arranged in the middle of the concave ring, the concave ring is matched with the main water inlet to form a bend, the concave ring is connected with the main water inlet to form a network, a bottom valve cage without a valve is formed, when the submersible pump works, the bottom valve cage is directly connected with a pump body or is vertically connected to be a fully-open main water inlet, when a dry motor water pump works, a pipeline can be used for connection, the working requirement of a water suction process is met, meanwhile, a bent pipe is arranged at the position, close to a volute, of a water inlet pipeline and is higher than the pump body, water in the volute cannot flow out of the main water inlet, and the bent pipe is matched with clean water injected from an auxiliary main water.

The invention has the following advantages:

according to the all-medium passing type sewage pump provided by the invention, the blades which are spirally fused with the main water inlet are arranged without cutting, the passing rate of the medium in the sewage is as high as eighty percent of the pipe diameter, the length of the passing wood rod can reach 1.5 times of the diameter of the main water inlet, and no blockage exists. In addition, the auxiliary main water inlet is arranged, so that gas between the impeller and the volute can be discharged in time, the passing rate and the cutting effect of silt, small stone and sand mud, various breeding excrements and the like are improved simultaneously under different conditions, and the sewage pump can be widely applied to various places such as excrement absorption, sewage discharge, sand pumping and the like.

Drawings

Fig. 1 is a schematic sectional view of a first all-media-passing type sewage pump according to an embodiment of the present invention.

Fig. 2 is a schematic front view of an impeller according to an embodiment of the present invention.

Fig. 3 is a schematic cross-sectional structural diagram of an impeller provided in an embodiment of the present invention.

Fig. 4 is a schematic cross-sectional structural view of a first blade according to an embodiment of the present invention.

Fig. 5 is a schematic cross-sectional structural view of a second blade according to an embodiment of the present invention.

FIG. 6 is a cross-sectional structural view of a third blade according to an embodiment of the present invention.

FIG. 7 is a schematic diagram of the effective area of the auxiliary water inlet provided by the present invention.

Fig. 8 is a schematic view of the operation of an impeller anti-sticking tooth of the sewage pump provided by the embodiment of the invention.

Fig. 9 is a schematic sectional view of a second all-media-passing type sewage pump according to an embodiment of the present invention.

Fig. 10 is a schematic sectional view of a third all-media passing type sewage pump according to an embodiment of the present invention.

10-a motor body, 11-a motor shaft, 12-a volute, 13-an impeller, 14-a main water inlet, 15-a water outlet, 151-a water cutting port, 16-an auxiliary water inlet, 17-a one-way check valve, 18-a water inlet baffle, 19-a baffle mounting block, 20-a concave ring and 21-a filter screen;

131-blade, 132-impeller front wall, 133-impeller rear wall, 134-screw interface, 1311-main blade, 1312-auxiliary blade, 1313-flow passage area, 1314-flow limiting area, 1315-anti-sticking tooth.

Detailed Description

The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

Example 1

As shown in fig. 1 and 2, an all-medium-passing type sewage pump includes a motor main body 10, a volute 12 and an impeller 13 disposed in the volute 12, the motor main body 10 is connected to the impeller 13 disposed in the volute 12 through a motor shaft 11, the impeller 13 includes an impeller front wall 132, an impeller rear wall 133 and a vane 132 disposed between the impeller front wall 132 and the impeller rear wall 133, the impeller front wall 132 is provided with a main water inlet 14; the head end of the blade 131 is gradually coiled at the edge position of the impeller rear wall 133 and extends towards the main water inlet 14, and the tail end of the blade 131 is integrated with the main water inlet 14; as the blades 131 approach the main inlet 14, the impeller back wall 133 rises toward the main inlet 14.

As shown in fig. 3, as the blades 131 approach the main water inlet 14, the main water inlet 14 on the front wall 132 of the impeller forms a circular truncated cone-shaped through hole with an inclined inner wall, so that the flow passage area of the impeller 13 has a uniform height.

As shown in fig. 4, the blade 131 includes a main blade 1311, a head end of the main blade 1311 is gradually wound from an edge position of the impeller rear wall 133 to extend toward the main water inlet 14, and a tail end of the main blade 1311 is integrated with the main water inlet 14; a flow passage region 1313 is formed between the impeller rear wall 133 and the impeller front wall 132.

As shown in fig. 5, the blade 131 includes two main blades 1311, the two main blades 1311 are uniformly distributed on the impeller front wall 132 to form two flow passage areas 1313, the head ends of the two main blades 1311 are respectively gradually coiled from the edge position of the impeller rear wall 133 to extend towards the main water inlet 14, and the tail ends of the two main blades 1311 are mutually coiled and integrated with the main water inlet 14;

as shown in fig. 6, the blade 131 includes a positive blade 1311 and at least one auxiliary blade 1312, the positive blade 1311 and the auxiliary blade 1312 are uniformly distributed on the impeller front wall 132, a flow passage area 1313 and a flow restriction area 1314 are formed between the impeller front wall 132 and the blade rear wall 133, head ends of the positive blade 1311 and the auxiliary blade 1312 gradually wind from an edge position of the impeller rear wall 133 to extend toward the main water inlet 14, and the positive blade 1311 and the auxiliary blade 1312 wind 180 degrees and then are integrated with the main water inlet 14.

The impeller rear wall 133 is provided with a threaded interface 134, and is connected to the end of the motor shaft 11 through the threaded interface 1314.

As shown in fig. 8, the impeller front wall 132 and the impeller rear wall 133 are provided with a plurality of anti-seizing teeth 1315 corresponding to the edge of the flow restriction region 1314.

The motor shaft 11 for installing the impeller 13 is connected by a nut, does not penetrate through the whole impeller 13, the tail end of the motor shaft 11 is not exposed at the main water inlet 14, the strip-shaped medium is not wound, the strip-shaped medium can be rolled into a twist shape under the rotation of the impeller 13 and then flows out of the impeller 13, the medium is easily clamped on the water cutting opening 151 when passing through the water cutting opening 151, so that the normal operation of the impeller 13 is blocked, the tail end of the flow limiting area 1314 of the impeller 13 is provided with an anti-clamping tooth 1315 for preventing the medium from being accumulated on the water cutting opening 151, and meanwhile, the anti-clamping tooth 151 is also arranged on the outer edge of the impeller front wall 132 of the impeller 13 and used for preventing the medium from being clamped between the impeller 13.

Example 2

On the basis of embodiment 1, in this embodiment, the upper portion of the spiral case 12 is connected to a water outlet 15, the spiral case 12 is further provided with an auxiliary water inlet 16 for injecting clean water into the spiral case 12, and the auxiliary water inlet 16 is connected to an external water pipe through a one-way check valve 17. The auxiliary water inlet 16 can be arranged at any place of the volute 12, the effect is better when the auxiliary water inlet 16 is closer to the outer circle of the impeller 13, the water is mainly driven to enter by the operation of the impeller 13, and the air in the volute 12 is driven to exit by the auxiliary water inlet.

The auxiliary water inlet 16 is positioned on the corresponding volute 12 in the outer circle of the impeller 13, when the sewage concentration is too high, clear water is injected into the volute 12 by using a clear water source, so that a flow of clear water flows between the impeller 13 and the volute 12, and the extrusion friction force of media between the impeller 13 and the volute 12 is reduced, so that the operating condition of the impeller 13 in the volute 12 is met, the check valve 17 is arranged at the auxiliary water inlet 16, when air in the impeller 13 cannot generate pressure, the auxiliary water inlet 16 feeds water into the volute 12, water flow is generated in the volute 12 to carry out air, the pressure of the water in the volute 12 can be rapidly generated, and after the pressure reaches the working requirement, the check valve 17 arranged in the auxiliary water inlet 16 prevents the sewage from entering an external water pipe. When the pressure in the volute 12 is lower than the water pressure in the auxiliary water inlet 16, the water in the water pipe flows into the volute 12, so that the impeller 13 works normally, and when the pressure in the volute 12 is higher than the water pressure in the auxiliary water inlet 16, the auxiliary water inlet 16 stops water inflow under the action of the check valve 17.

As shown in fig. 7, the region of the auxiliary water inlet 16 between the impeller 13 and the volute 12 outside the region corresponding to the water cutting opening 151 is an active region of the auxiliary water inlet 16, corresponding to a shaded portion in the drawing.

As shown in fig. 9, a water inlet baffle 18 is fixedly disposed at a position of the front end of the volute 12 corresponding to the main water inlet 14 through a set of baffle mounting blocks 19, and the water inlet baffle 18 is located on one diameter of the main water inlet 14. The sewage pump is not afraid of strip and sheet media, only afraid of overlarge and overlong wood stick media entering the impeller to form blockage, the main water inlet is provided with a baffle plate perpendicular to the main water inlet to divide the main water inlet into two parts for preventing the media from entering the main water inlet when the media is larger than a half of aperture.

As shown in fig. 10, a concave ring 20 is disposed at the front end of the volute 12 corresponding to the main water inlet 14, a filter screen 21 is further disposed between the main water inlet 14 and the concave ring 20, the filter screen 21 is disposed at the front end of the volute 12, and the filter screen 21 intersects with the axis of the main water inlet 14 to form a water flow curve.

A bend interception and a net interception are arranged at the main water inlet, and the interception is characterized in that the net main water inlet is large; the bend interception is that a concave ring is arranged at the bottom of a main water inlet, a main water inlet is arranged in the middle of the concave ring, the concave ring is matched with the main water inlet to form a bend, the concave ring is connected with the main water inlet to form a network, a bottom valve cage without a valve is formed, when the submersible pump works, the bottom valve cage is directly connected with a pump body or is vertically connected as a fully-open main water inlet, when a dry motor water pump works, a pipeline can be used for connection, the working requirement of a water suction process is met, meanwhile, the bend is arranged at the position, close to a volute, of a water inlet pipeline and is higher than the pump body, water in the volute cannot flow out of the main water inlet, and the bend interception is matched with clean water injected from an auxiliary main water inlet to.

Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. The all-medium-passing sewage pump is characterized by comprising a motor main body, a volute and an impeller arranged in the volute, wherein the motor main body is connected with the impeller arranged in the volute through a motor shaft, the impeller comprises an impeller front wall, an impeller rear wall and blades arranged between the impeller front wall and the impeller rear wall, and a main water inlet is formed in the impeller front wall; the head ends of the blades are gradually coiled at the edge position of the rear wall of the impeller and extend towards the main water inlet, and the tail ends of the blades are integrated with the main water inlet; as the blades approach the main water inlet, the impeller rear wall rises to approach the main water inlet;

along with the blades approach the main water inlet, the main water inlet on the front wall of the impeller forms a circular truncated cone-shaped through hole with an inclined inner wall, so that the flow passage area of the impeller has uniform height.

2. The all-media sewage pump of claim 1 wherein said blades comprise a main blade, the head end of said main blade gradually coiling from the edge of the back wall of said impeller and extending toward said main water inlet, the tail end of said main blade merging with said main water inlet; a flow passage area is formed between the impeller back wall and the impeller front wall.

3. The all-media sewage pump of claim 1 wherein said blades comprise two main blades, said two main blades are uniformly distributed on said impeller front wall to form two flow channel regions, the head ends of said two main blades are gradually coiled from the edge position of said impeller rear wall to extend towards said main water inlet, and the tail ends of said two main blades are mutually coiled and integrated with said main water inlet.

4. The all-media sewage pump of claim 1 wherein the blades comprise a positive blade and at least one secondary blade, the positive blade and the secondary blade are uniformly distributed on the front wall of the impeller, a flow passage area and a flow restriction area are formed between the front wall of the impeller and the rear wall of the blade, the head ends of the positive blade and the secondary blade respectively gradually coil from the edge position of the rear wall of the impeller and extend towards the main water inlet, and the positive blade and the secondary blade are integrated with the main water inlet after being coiled for 180 degrees.

5. The all-media-pass sewage pump according to claim 1, wherein the rear wall of the impeller is provided with a threaded interface, and the rear wall of the impeller is connected with the end of the motor shaft through the threaded interface.

6. The all-media through-type sewage pump of claim 1, wherein the edges of the impeller front wall and the impeller rear wall corresponding to the flow-restricting area are provided with anti-seizing teeth.

7. The sewage pump according to any of the claims 1-6, wherein the volute is provided with a water outlet at an upper portion thereof, and an auxiliary main water inlet for injecting water into the volute is further provided at the volute, and the auxiliary main water inlet is connected to an external water pipe through a one-way check valve.

8. The all-media through-type sewage pump of claim 7, wherein the front end of the volute is fixedly provided with a water inlet baffle corresponding to the main water inlet through a set of baffle mounting blocks, and the water inlet baffle is located on one diameter of the main water inlet.

9. The all-media-pass sewage pump according to claim 7, wherein a concave ring is disposed at the front end of the volute corresponding to the main water inlet, a filter screen is disposed between the main water inlet and the concave ring, the filter screen is disposed at the front end of the volute, and the filter screen intersects with the axis of the main water inlet to form a water flow curve.